Jeweler s roll



UNITED STATE-S vJOHN o. ROOHELEAU, OE WORCESTER, MASSACHUSETTS.

JEWELERS ROLL.

SPECIFICATION forming part of Letters Patent No. 503,218, dated August15, 1893. i Application filed June 5, 1890. Serial No. 354,401. (Nomodel.) l

.To all whom timmy concern.-

Be it known that I, JOHN C. ROOHELEAU, a citizen of the United States,and a resident of Worcester, in the county of Worcester and State ofMassachusetts, have invented a new and useful Improvement in JewelersRolls, of which the following is a specification, reference being had tothe accompanying drawings, forming a part of the same, and in which-Figure l represents a front elevation of a jewelers roll, which embodiesmy invention. Fig. 2 is an end view of the same. Fig. 8 is a view of apair of rolls detached from their housing and made adjustable, and Fig.4 represents the lower roll shown in Fig. 3, but with the guidesrepresented in sectional view.

Similar letters refer to similar parts in the different iigures.

My present invention relates to certain improvements in jewelers rollsfor enlarging rings and it consists incertain changes and modificationsof the jewelers rolls for the same purpose, which formed the subject ofthe Letters Patent No. 361,084, granted to me on the 12th day of April,1887, to which Letters Patent reference is herein made.

The object of my present invention is to provide means whereby thelateral displacement of the ring is prevented, in case it is necessaryto bring the pressure to bear entirely upon one edge of the ring, toprovide means whereby the pressure can be applied to one edge of thering only, the opposite edge being entirely relieved from pressure.

Referring tothe accompanying drawings A, denotes the .frame in which therolls are j ournaled.

B denotes the upper roll which is j ournaled in boxes capable of avertical adjustment.

C is the lower roll upon which the ring to be enlarged is placed andjournaled inthe half boxes C', C', in order to allow the roll to bereadily removed. l

Pressure is applied to the upper roll B throughthe screw threaded rodsD, D, in the same manner and for the same purpose as shown and describedin the Letters Patent above referred to.

The upper roll B is provided with concave grooves to iit the convexsides of the rings and the face of the lower roll is a plain cylindri=Cal surface, upon which the ring is supported as itis being stretchedbetween the rolls. The ring to be enlarged is placed upon the lower rolland the upper roll B is brought against it with a pressure whichoperates to stretch the ring as it is'rolled back and forth between therolls, .in the same manner as described in the Letters Patent abovereferred to. In case a ring was thinner upon one edge than upon theother the* pressure of the rolls would be applied to the thicker edge,and upon one side of the center of the ring causing the ring to slidealong upon the lower roll. It is also sometimes desirable to press uponthe ring at one of its edges with a harder pressure than upon the otheredge. For this purpose the concave groove in the upper roll is made soas to press harder upon one side than upon the other, independently ofthe thickness of the edges of the ring, and in such cases it isnecessary to prevent the lateral displacement of the ring. The upperroll B containing the concave grooves Bare also provided with grooves B2to receive the flan ges C2 and in the spaces between the flanges C2 uponthe lower roll the ring, to be enlarged, is placed and the upper roll isbrought down upon the surface of the ring with a pressure appliedthrough the screw threaded rods D, D. The spaces between the flanges C2are made of different widths to t rings of different widths, so that aring placed between two of the flanges will be held from lateraldisplacement upon the lower roll. Likewise the upper roll is providedwith a series of concave grooves B to -fit the'convex surface of ringsof dierent widths, and the spaces between the iianges uponthe lower rollcorrespond with the Widths of the concave grooves, B. In order to allowa pressure to be applied to one edge of aring when desired, I form aportion of the grooves upon the upper roll, as shown at B3, Figs. l and3, so that one edge of the ring will be rolled by contact with the.upper and lower rolls while the opposite edge is out of contact withthe upper roll. This result is accomplished by making the diameter ofthe upper roll at one side of the concave groove greater than thediameter upon the opposite side, so that when a ring whose outer orconvex surface is symmetrical, the pressure will be greater upon oneside than upon the other.

In Figs. 1 and 2 I have shown a completed machine in which the rolls areprovided with a series of grooves adapted to receive rings ot' varyingwidths; in practice, however, I prefer to form a single concave grooveupon the upper roll Band thereby allow space for adjustable flanges uponthe lower roll, allowing the space between the flanges to be varied andthe upper roll exchanged for rolls having grooves of different sizes. Inorder to adjust the flanges C2 upon the lower roll C, I form screwthreaded sections C4 and C5 and I provide the [langes C2with hubs Eforming an internal screw thread fitting the screw threaded sectionsupon the lower roll.

The screw threaded sections O4 and are right and left screw threadsrespectively, so that the nuts E, E, are adjusted to fit other upperrolls having grooves of varying width. lhe flanges C2 are small enoughto allow the ring to be stretched to slip over them and drop into thespaces between the anges.

lVhat I claim as my invention, and desire to secure by Letters Patent,isM

l. In a machine for enlarging jewelers rings, the combination of anupper Wall provided with annular grooves B2 forming, between saidgrooves, an annular flange having on its periphery a concave groove B',adapted to tit the outer surface of a ring and a lower roll providedwith radial flanges C2 entering the annular grooves B2 in the upper rolland having the space between said radial flanges corresponding with thewidth of said concave groove B', whereby the ring to be enlarged is heldfrom lateral displacement, and having between said radial Ilan ges acylindrical surface C3 to bear upon the inside of the ring,substantially as described.

2. In a machine for enlarging jewelers rings, the combination of anupper roll, provided with a projecting surface bearing upon the outersurface of the ringr to be enlarged, alower roll provided with screwthreaded sections, and flan ged nuts carried upon said screw threadedsections and inclosing the ring, whereby it is held from lateraldisplacement, substantially as described.

Dated at Worcester, in the county of Worcester and State ofMassachusetts, this 31st day of May, 1890.

JOHN C. ROCHELEAU.

Witnesses:

RUFUs B. FOWLER, 1I. M. FOWLER.

